Dimethylformamide → 3,5-Difluoro-4-(hydroxymethyl)benzonitrile

HRID 2404342Notes

Reaction equation

HRID 2404342 reaction equation
Br[C:2]1[CH:7]=[C:6]([F:8])[C:5]([CH2:9][OH:10])=[C:4]([F:11])[CH:3]=1.[CH3:12][N:13](C=O)C>C(Cl)Cl.O.C1C=CC([P]([Pd]([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)[P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)=CC=1.[C-]#N.[Zn+2].[C-]#N>[F:11][C:4]1[CH:3]=[C:2]([CH:7]=[C:6]([F:8])[C:5]=1[CH2:9][OH:10])[C:12]#[N:13]

Participants

7

Reactant 2

HCID 6228DimethylformamideHCID 27733034-Bromo-2,6-difluorobenzyl alcohol

Product 1

HCID 469414123,5-Difluoro-4-(hydroxymethyl)benzonitrile

Reagents, catalysts & solvents 4

HCID 11186Zinc cyanide (Zn(CN)2)CatalystHCID 178418397HCID 178418397, compoundCatalystHCID 962WaterSolventHCID 6344DichloromethaneSolvent

Conditions

Temperature
90 °C

Procedure

A mixture of (4-bromo-2,6-difluorophenyl)methanol (1.12 g, 5.0 mmol), Pd(PPh3)4 (323 mg, 0.28 mmol) and zinc cyanide (587 mg, 5.0 mmol) was prepared in DMF (7 mL) under nitrogen atmosphere and heated at 90° C. for 18 hours. The mixture was diluted with DCM and water. The organic phase was passed through a hydrophobic frit and the solvent evaporated in vacuo. The residue was purified by flash chromatography (silica, iso-hexane/EtOAc) to afford the title compound. 1H NMR (CDCl3, 400 MHz) δ 7.28-7.21 (2H, m), 4.83 (2H, d, J=6.7 Hz), 1.95 (1H, t, J=6.7 Hz).

Workup

  1. customthe solvent evaporated in vacuo
  2. customThe residue was purified by flash chromatography (silica, iso-hexane/EtOAc)

Sources & evidence

ORD record
ord-9e39a18d94fe42d9bc218ac2385947fb
Source dataset
uspto-grants-2014_08
Patent number
US08802704B2

Reaction notes

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